dr. jackie sack nctm annual meeting march 23, 2007 b u ild i t d raw it i n t er p r e t it
TRANSCRIPT
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Dr. Jackie Sack
NCTM Annual Meeting
March 23, 2007
B u i l d I tD r aw I t
I n t e r p r e t I t
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2-D:The van Hiele Model of Geometric Thought
Levels
Language
Phases
Visual Descriptive Relational Deductive Rigor
Information Guided Orientation Explicitation Free Orientation Integration
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3-D Frameworks
Yakimanskaya van Niekerk
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What skills are needed?
Turn, shrink and deform 2-D and 3-D objects. Analyze and draw perspective views, count
component parts and describe attributes that may not be visible but can be inferred.
Physically and mentally change the position, orientation, and size of objects in systematic ways as understandings about congruence, similarity and transformations develop.
(NCTM, 2000)
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Does it make sense to begin with 2-D figures?
Rectilinearity or straightness? Flatness? Parallelism? Right angles? Symmetry? Circles? Similarity?
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3-D Models
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Conventional-Graphic Models
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Conventional-Graphic Models: Functional Diagrams
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Conventional-Graphic Models: Assembly Diagrams
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Conventional-Graphic Models:Structural Diagrams
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Intervention Program
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Soma Pieces
1 2 3 4
5 76
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Three visual modes
Full-scale or scaled-down models of objects
Conventional-graphic models Semiotic models
Side ViewFront ViewTop View
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Framework for 3-Dimensional Visualization
3-DIMENSIONAL MODEL
CONVENTIONAL GRAPHIC REPRESENTATION OF THE
3-D MODEL
VERBAL DESCRIPTION OF THE 3-D MODEL
(oral or written)
REBUILD IT
TALK ABOUT IT
REPRESENT IT ABSTRACTLY
DRAW OR RECOGNIZE IT IN A
PICTURE
1
12
top front side
SEMIOTIC OR ABSTRACT REPRESENTATION OF THE
3-D MODEL
This slide is not to be reproduced in any form without the express permission of Jackie Sack.
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3-Dimensional Model Stimulus
Which piece?
Can you rebuild it using loose cubes?
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3-Dimensional Model Stimulus
Rebuild it using loose cubes.
Draw it.
Explain how to build it.
Can you make this figure using two Soma pieces?
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Draw it…
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2-D Conventional Graphic Model
Show how these two Soma pieces can be combined to create this figure.
Rebuild it using loose cubes.
Draw it.
Explain how to build it.
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2-D Conventional Graphic Model
Show how these two Soma pieces can be combined to create this figure.
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2-D Conventional Graphic Model
Show how these three Soma pieces can be combined to create this figure.
++
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2-D Conventional Graphic Model
Which two Soma pieces were combined to create this figure?
1 23 4
5
7
6
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2-D Conventional Graphic Model
Which two Soma pieces were combined to create this figure?
1 23 4
5
7
6
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Describe it verbally
Use Soma pieces 1, 2, 3, 4 and 5.
5 and 4 go on the lower front.
Stand 3 behind 5, three cubes tall; and 2 next to 3
with its short leg on the ground pointing toward
the front, next to 4. 1 goes on top of 2 and 4.
2
4
1
3
5
54 3
21
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Represent the figure abstractly
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Represent the figure abstractly
Upper level
Lower level
5
55
6
56
66
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Represent the figure abstractly
1
1
11
1
2
1
1 2
+
+
1
1
11
1
2 2
2
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Represent the figure abstractly
How many and which Soma pieces do you need to build this figure?
Build the figure.
2
2
2
1
1
1
1
11
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Beyond cubes…
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Describe the figure’s net
C
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Describe the 3-D figure
Y
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Describe the 3-D figure
U
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2-D Implications:Reflections
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2-D Implications:Rotations
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Transformations:2-D Geometry
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median
180o
Transformations:2-D Geometry
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8
6
4
2
-2
-4
-10 -5 5
.9cos15o .9cos105o -1.25
.9sin15o .9sin105o 1.1
0 0 1
Transformations:Pre-Calculus – Calculus
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6
4
2
-2
-4
-10 -5 5
Transformations:Back to Geometry
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References
Crowley, Mary L. “The van Hiele Model of the Development of Geometric Thought.” In Learning and Teaching Geometry, K – 12, 1987 Yearbook of the National Council of Teachers of Mathematics (NCTM), edited by Mary M. Lindquist, pp. 1-16. Reston, VA: NCTM, 1987.
Freudenthal, Hans. Didactical Phenomenology of Mathematical Structures. Dordrecht, Holland: Reidel, 1983.
Fuys, David, Geddes, Dorothy and Tischler, Rosamond. The van Hiele Model of Thinking in Geometry among Adolescents, Journal of Research in Mathematics Education, Monograph Number 3, Reston, VA: NCTM, 1988.
NCTM. Principles and Standards for School Mathematics. Reston, VA: NCTM, 2000.van Hiele, Pierre. M. Structure and Insight: A Theory of Mathematics Education.
Orlando, FL: Academic Press, 1986.van Niekerk, (Retha) H. M. “From Spatial Orientation to Spatial Insight: A Geometry
Curriculum for the Primary School.” Pythagoras, 36 (1995a): 7-12.van Niekerk, Retha. “4 Kubers in Africa.” Paper presented at the Panama
Najaarsconferentie Modellen, Meten en Meetkunde: Paradigmas's van Adaptief Onderwijs, The Netherlands, 1995b.
van Niekerk, Retha. “4 Kubers in Africa.” Pythagoras, 40, (1996): 28-33.van Niekerk, (Retha) H. M.. “A Subject Didactical Analysis of the Development of the
Spatial Knowledge of Young Children through a Problem-Centered Approach to Mathematics Teaching and Learning.” Ph.D. diss., Potchefstroom University for CHE, South Africa, 1997.
Yakimanskaya, I. S. The Development of Spatial Thinking in School Children. Edited and translated by Patricia S. Wilson and Edward J. Davis. Vol. 5 of Soviet Studies in Mathematics Education, Reston, VA: NCTM, 1991.